package com.books4sale.admin.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

public class AuthenticateFilter implements Filter {

	private FilterConfig filterConfig;
	
	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain filterChain) throws IOException, ServletException {
		UserService userService = UserServiceFactory.getUserService();
		User user = userService.getCurrentUser();
		if (user == null) {
			HttpServletResponse resp = (HttpServletResponse) response;
			HttpServletRequest req = (HttpServletRequest) request;
			System.out.println(req.getRequestURI());
			resp.sendRedirect(userService.createLoginURL("/admin"));
		} else {
			filterChain.doFilter(request, response);
		}

	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig = filterConfig;
	}

}
